A car Salesman offers " any used Toyota on the lot for $10,000 if purchased on Tuesday. "when you,the first customer on that Tuesday, arrive to purchase one,he tells you that he's all out of Toyotas, but you can purchase a used Kia for the same amount. "He is guilty of:

A)counter-advertising

B)Puffery

C)Fraud

D) Bait ans switch advertising